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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12358) FSShell should prompt before deleting directories bigger than a configured size
Date Fri, 28 Aug 2015 07:03:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14718131#comment-14718131
] 

Xiaoyu Yao commented on HADOOP-12358:
-------------------------------------

Thanks [~aw] for the feedback. 

bq. doing this will break large jobs that remove their working directories prior to execution.

Only admins who want to use this feature would consider this aspect and by default it is disabled.
Also, the feature is exposed only via FSShell, so MR jobs using delete API will not be impacted.

bq. I can't think of a single other file system that has this limitation across the multitude
of operating systems I've worked on. It will definitely surprise users. Given that there are
plenty of other ways to protect against users making a mistake (snapshots, trash) and the
countless ways to work around it even when it is turned on, the risk/reward isn't really there.

There is no risk because of the above two reasons. It is a useful feature because it will
reduce the occurrences of cases where admins deleted large amount of data inadvertently. It
doesn't prevent all mistakes users can make..but it will prevent against some mistakes and
that itself is worth a reward.

> FSShell should prompt before deleting directories bigger than a configured size
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-12358
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12358
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaoyu Yao
>         Attachments: HADOOP-12358.00.patch, HADOOP-12358.01.patch, HADOOP-12358.02.patch,
HADOOP-12358.03.patch
>
>
> We have seen many cases with customers deleting data inadvertently with -skipTrash. The
FSShell should prompt user if the size of the data or the number of files being deleted is
bigger than a threshold even though -skipTrash is being used.



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